If the area surrounding your filter isn't completely sealed, air can be

website air filter slot cover The Filter Slot Seal is ideal for any furnace, air conditioner or air cleaner filter Based on recommendations by the Department of Energy, you should cover airbet88 slot Filters · HEPACarbon Filter · Bio-Guard Filter · Ozone Filter · Stainless Steel Pre-Filter · Nuwave OxyPure EZ Clean Cover 2-pack · Filter Slot Cover

air filter slot cover I just had a new Furnace installed, but the filter was done as just cut out slot in the ductwork Where was the air filter located previous to  FilterLock satisfies the department of energy recommendation that the furnace filter slot be covered to avoid air leaks; Click here to learn more about Eco  The FilterLOCK covers and seals the standard 1” furnace filter slots The overlapping two-piece design allows for filter slots measuring up to 25” in width

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